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WO2018132019A3 - Improvements in rotary claw pumps - Google Patents

Improvements in rotary claw pumps Download PDF

Info

Publication number
WO2018132019A3
WO2018132019A3 PCT/NZ2017/050176 NZ2017050176W WO2018132019A3 WO 2018132019 A3 WO2018132019 A3 WO 2018132019A3 NZ 2017050176 W NZ2017050176 W NZ 2017050176W WO 2018132019 A3 WO2018132019 A3 WO 2018132019A3
Authority
WO
WIPO (PCT)
Prior art keywords
rotation
pair
discharge port
thickness
rotor
Prior art date
Application number
PCT/NZ2017/050176
Other languages
French (fr)
Other versions
WO2018132019A2 (en
Inventor
John Fleming
Original Assignee
John Fleming
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by John Fleming filed Critical John Fleming
Priority to US16/484,214 priority Critical patent/US20200032799A1/en
Publication of WO2018132019A2 publication Critical patent/WO2018132019A2/en
Publication of WO2018132019A3 publication Critical patent/WO2018132019A3/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/084—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/123—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially or approximately radially from the rotor body extending tooth-like elements, co-operating with recesses in the other rotor, e.g. one tooth
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2250/00—Geometry
    • F04C2250/20—Geometry of the rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/17—Tolerance; Play; Gap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)

Abstract

A Rotary Claw Pump wherein at least one pair of intermeshing rotors has the same shape within a tolerance of plus or minus 3 percent of the radii from the edges of their shapes to their centers of rotation and wherein on a convex portion of the claws there is a nominal uniform rate of change of radius with angle of rotation and wherein there may be multiple stages wherein the thickness of each successive rotor pair does not vary in profile but has a thickness within 20% of the thickness of the first stage rotor pair multiplied by the inverse products of the compression ratios of the preceding stages and wherein a discharge port is at least partially uncovered at any position of rotation from where a pair of intermeshing claw rotor tips are at their closest point of approach to where the said claw tips are at their furthest apart and wherein said discharge port is at least partially connected with a region connected with the rotor tips of both the said claws during said positions of rotation and the discharge port thereby at least limits pressure increase in the said region.
PCT/NZ2017/050176 2017-01-10 2017-12-27 Improvements in rotary claw pumps WO2018132019A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US16/484,214 US20200032799A1 (en) 2017-01-10 2017-12-27 Improvements in rotary claw pumps

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ728157 2017-01-10
NZ72815717 2017-01-10

Publications (2)

Publication Number Publication Date
WO2018132019A2 WO2018132019A2 (en) 2018-07-19
WO2018132019A3 true WO2018132019A3 (en) 2019-01-31

Family

ID=62840226

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ2017/050176 WO2018132019A2 (en) 2017-01-10 2017-12-27 Improvements in rotary claw pumps

Country Status (2)

Country Link
US (1) US20200032799A1 (en)
WO (1) WO2018132019A2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111120328B (en) * 2019-12-31 2020-10-27 中船重工(重庆)西南装备研究院有限公司 Claw type pump rotor tooth form
CN111637055B (en) * 2020-07-03 2025-03-14 中国石油大学(华东) A claw type compressor
FR3117176B1 (en) * 2020-12-04 2023-03-24 Pfeiffer Vacuum Vacuum pump
CN112628141A (en) * 2020-12-18 2021-04-09 汉纬尔机械(上海)有限公司 Asymmetric main rotor with steps
CN114320921B (en) * 2021-12-30 2023-08-25 中船重工(重庆)西南装备研究院有限公司 Design method of double-head claw pump rotor molded line
CN114658656B (en) * 2022-03-04 2024-05-24 中科仪(南通)半导体设备有限责任公司 Straight claw type rotor for dry vacuum pump and design method thereof
CN115289017B (en) * 2022-08-30 2024-07-30 山东亿宁环保科技有限公司 Homotype multi-claw rotor
CN115559901B (en) * 2022-12-07 2023-03-24 中核第七研究设计院有限公司 Claw type vacuum pump rotor and vacuum pump

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4983107A (en) * 1987-05-15 1991-01-08 Leybold Aktiengesellschaft Multistage rotary piston vacuum pump having sleeves to fix shaft positions
US20120257961A1 (en) * 2009-12-24 2012-10-11 Anest Iwata Corporation Multistage vacuum pump
US20140227122A1 (en) * 2011-09-30 2014-08-14 Anest Iwata Corporation Claw pump
KR20160011615A (en) * 2013-05-30 2016-02-01 오리온 기까이 가부시끼가이샤 Two-shaft rotary pump
US20160258435A1 (en) * 2013-11-05 2016-09-08 Anest Iwata Corporation Claw pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4983107A (en) * 1987-05-15 1991-01-08 Leybold Aktiengesellschaft Multistage rotary piston vacuum pump having sleeves to fix shaft positions
US20120257961A1 (en) * 2009-12-24 2012-10-11 Anest Iwata Corporation Multistage vacuum pump
US20140227122A1 (en) * 2011-09-30 2014-08-14 Anest Iwata Corporation Claw pump
KR20160011615A (en) * 2013-05-30 2016-02-01 오리온 기까이 가부시끼가이샤 Two-shaft rotary pump
US20160258435A1 (en) * 2013-11-05 2016-09-08 Anest Iwata Corporation Claw pump

Also Published As

Publication number Publication date
WO2018132019A2 (en) 2018-07-19
US20200032799A1 (en) 2020-01-30

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